Whats difference between a single phase & a three phase
motor?
Answers were Sorted based on User's Feedback
Answer / jijomon
Single phase motor has pulsating magnetic field and three
phase motor has rotating magnetic field
| Is This Answer Correct ? | 27 Yes | 2 No |
Answer / ahmed hamdy
single phase motor can't self started so we use another winding only in starting and then this winding disconnected due to motor speed and also connect a capacitor to make phase different to generate rotating magnetic field but in 3 ph this not happened because rotating magnetic field is self generated due to phases different angle which shifted by 120 degree
| Is This Answer Correct ? | 18 Yes | 6 No |
Answer / venkatakrishnan
3-phase motors are self starting,whereas the single phase
motors are not self starting.
| Is This Answer Correct ? | 19 Yes | 8 No |
Answer / p. naik
The starting circuit of of a3-phase motor has a contactor
wherein all the 3 phases of the supply are connected to it.
Whereas in 1-phase motors only 2 phases are required & the
third input of the contactor is looped from it's own
output.The main diffrence can be spoted in the power
diagram itself.
| Is This Answer Correct ? | 11 Yes | 12 No |
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